Final answer:
Carl Rogers would likely say that Sandy is receiving conditional positive regard since her father's love is dependent on her academic performance (b).
Step-by-step explanation:
Carl Rogers, a humanistic psychologist, believed in the concept of unconditional positive regard — which is the acceptance and love a person receives from significant others regardless of his or her behavior. In contrast, conditional positive regard is acceptance and love that depend on the child behaving in certain ways or meeting certain standards. Therefore, if Sandy's father will love her only if she gets very good grades, Carl Rogers would say that she is receiving conditional positive regard.
This expectation and conditionality can lead to incongruence, where Sandy's real self feels pressured to meet the expectations of the ideal self her father is imposing — the achieving student that is worthy of love only through academic success. This can affect her self-concept negatively.